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Effect of replacing B by Zr in amorphous Co-Fe-Si-B soft magnetic alloys

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Abstract

Amorphous ribbons of Co69Fe7Si14B10-xZrx (x = 0, 2.5, 5, 7.5 and 10) alloys have been prepared and their structure, soft magnetic and magnetoimpedance (MI) properties have been investigated. Glass forming ability (GFA) of these alloys was calculated using GFA parameter (α = Tx/Tl) and verified by experimental results. Saturation magnetization of the amorphous ribbon decreases on replacement of B by Zr which reveals Zr has more pronounced effect in decreasing saturation magnetization. However, improvement of other soft magnetic properties (coercivity and permeability) leads to considerable increase in MI properties. Annealing leads to crystallization of Co2Si, Co2B, Co2Zr and CoSi phases causing deterioration of soft magnetic and MI properties due to the magnetic hardness of the secondary phase which arises due to the presence of magnetocrystalline anisotropy.

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Acknowledgments

This work was supported by Defence Research and Development Organization, Govt. of India. The authors are grateful to Dr. A.K. Singh, DMRL, Hyderabad, India, for x-ray diffraction studies and A.P. Srivastava, BARC, Mumbai, India, for TEM studies. The authors are thankful Dr. G. Malakondaiah, Director, DMRL, Hyderabad, India, for continued support and permission to publish this work.

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Authors and Affiliations

  1. Defence Metallurgical Research Laboratory, Hyderabad, 500 058, India

    Diraviam Arvindha Babu

  2. National Institute of Technology, Raipur, Chattisgarh, 492 010, India

    Wasif Hussain Khan

  3. Defence Metallurgical Research Laboratory, Hyderabad, 500 058, India

    Jeyaramane Arout Chelvane

  4. Proof and Experimental Establishment, Balasore, Orissa, 756 025, India

    Trilochan Sahoo

  5. Defence Metallurgical Research Laboratory, Hyderabad, 500 058, India

    Dilshad Akhtar

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  1. Diraviam Arvindha Babu
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Correspondence to Diraviam Arvindha Babu.

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Arvindha Babu, D., Khan, W.H., Chelvane, J.A. et al. Effect of replacing B by Zr in amorphous Co-Fe-Si-B soft magnetic alloys. Journal of Materials Research 27, 1080–1085 (2012). https://doi.org/10.1557/jmr.2012.49

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